Question: Do you think that if it wasnt for Isaac Newton would we know about gravity ?

Hey grimeche, like your question!
It was actually Gallileo Gallilei who did a lot of the ground work towards our understanding of gravity. He did some famous experiments including rolling balls from the Tower of Pisa. And this really set the scene for Newton’s theory. This makes me think someone else would have figured it out without Newton. But his contribution to science has been enormous, that goes without question.